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Error code reference

Frigidaire Cooktop Error Code E45

Incoming power supply low voltage.

Frigidaire codesFrigidaire cooktop codes

Incoming power supply low voltage.

First step from the service manual

Verify incoming power supply to cooktop.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E45 means on a Frigidaire cooktop

The E45 error code on a Frigidaire cooktop indicates that the appliance is detecting an incoming power supply voltage that falls below the acceptable operating threshold. The cooktop's control board continuously monitors the voltage being delivered through the household circuit. When that voltage drops too low, the board triggers E45 to alert the user and prevent operation under conditions that could damage internal components or result in inconsistent heating performance.

The most common source of this fault is a problem at the electrical supply level rather than within the cooktop itself. This includes issues such as a weak or failing circuit breaker, a loose or corroded connection at the terminal block, a degraded wall receptacle, or a broader utility supply problem affecting the home. In some cases, a high-resistance connection anywhere along the supply path can cause a voltage drop significant enough to trigger the error, even if the breaker appears functional.

Diagnosis should begin at the power source. A technician should use a multimeter to verify that the incoming voltage at the terminal block or receptacle meets the cooktop's specified supply requirements. If voltage at the outlet or terminal block is within spec but the error persists, the control board itself may be misreading the supply voltage, pointing to a potential board-level fault. Any loose wiring, signs of heat damage, or corrosion at the connection points should be addressed before assuming the board is at fault.

Source: manufacturer service documentation.

Common causes of E45

  1. 01

    Low household supply voltage

    Wiring / connection

    A drop in voltage from the utility or within the home's electrical panel can cause E45. Check the voltage at the supply circuit with a multimeter to confirm it meets the cooktop's requirements.

  2. 02

    Loose or corroded wiring at the terminal block

    Wiring / connection

    A loose or corroded connection at the cooktop's terminal block creates resistance that reduces effective voltage. Inspect the terminal block for signs of heat damage, corrosion, or loose wire connections.

  3. 03

    Weak or failing circuit breaker

    Part replacement

    A breaker that is beginning to fail may still appear to be in the ON position but may not be supplying full voltage. Test the voltage output at the breaker and at the receptacle or terminal block to compare.

  4. 04

    Degraded wall receptacle or outlet

    Part replacement

    For plug-in cooktop models, a worn or damaged receptacle can cause a voltage drop under load. Inspect the outlet for physical damage and measure voltage with the cooktop connected.

  5. 05

    Faulty control board

    Part replacement

    If all supply voltage measurements are within acceptable range and the error persists, the control board may be incorrectly reading the incoming voltage. This is less common but requires board replacement to resolve.

See the test procedure for each cause

Frequently asked questions about E45

What does E45 mean on a Frigidaire cooktop?
E45 indicates that the cooktop's control board has detected an incoming power supply voltage that is too low for safe operation. The appliance monitors its supply voltage continuously, and when the voltage falls below the acceptable threshold, this code is triggered. The problem is most often found in the home's electrical supply rather than the cooktop itself.
How do I fix the E45 error on my Frigidaire cooktop?
Start by checking the circuit breaker for the cooktop and verifying it is fully engaged and supplying proper voltage. Use a multimeter to measure the voltage at the terminal block or receptacle to confirm it meets the required supply specification. Inspect all wiring connections for looseness or corrosion. If the supply voltage is confirmed to be correct and the error persists, a faulty control board may need to be evaluated.
Is it safe to use my Frigidaire cooktop when E45 is displayed?
No, you should not continue using the cooktop while E45 is active. Low voltage conditions can cause the cooktop to perform unpredictably, may prevent proper temperature regulation, and can potentially damage internal components over time. Address the underlying power supply issue before resuming use.
Will resetting my Frigidaire cooktop clear the E45 error?
Resetting the cooktop by disconnecting power for a few minutes may temporarily clear the error display, but it will return if the underlying low voltage condition has not been corrected. The fault is tied to the actual supply voltage being detected, so a lasting fix requires resolving the electrical supply issue rather than simply resetting the unit.
How much does it cost to repair an E45 error on a Frigidaire cooktop?
Repair costs vary depending on the root cause. If the issue is a loose wiring connection, costs may be minimal, typically in the range of a standard service call fee. Replacing a circuit breaker may cost between $150 and $300 including labor. If the cooktop's control board needs replacement, parts and labor can range from $200 to $450 or more depending on the specific model and local labor rates.

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